Inchworm (Geometer moth caterpillar)

Scientific Name: Family Geometridae (multiple species)

Order & Family: Lepidoptera: Geometridae

Size: 10mm to 50mm depending on the species and growth stage.

Inchworm (Geometer moth caterpillar)

Natural Habitat

Found globally in gardens, forests, and suburban areas, typically on host plants like various deciduous trees and shrubs.

Diet & Feeding

Herbivorous; primarily feeds on the leaves of trees, shrubs, and garden plants.

Behavior Patterns

Characterized by a 'looping' movement due to a lack of prolegs in the middle of the body. They often mimic twigs to avoid predators and can spin silk threads to drop from branches when threatened.

Risks & Benefits

They are generally harmless to humans. While large populations can defoliate plants (a risk to gardens/forestry), they are beneficial as a vital food source for birds and predatory insects.

Identified on: 2/17/2026